Bearing with composite sealing structure

Abstract

The utility model discloses a bearing with a composite sealing structure, which relates to the technical field of bearing manufacturing and comprises a bearing assembly and a sealing structure, the bearing assembly comprises a bearing inner ring, a bearing outer ring and a rolling body arranged between the bearing inner ring and the bearing outer ring, and retainers are sleeved on two sides of the rolling body; the sealing structure is installed between the bearing inner ring and the bearing outer ring, the sealing structure comprises a hemming rubber coating cover and an annular check ring, the hemming rubber coating cover and the annular check ring are both of an annular structure, the hemming rubber coating cover is clamped to the inner diameter of the bearing outer ring, a closed first containing cavity is formed among the hemming rubber coating cover, the bearing inner ring, the bearing outer ring and the rolling body, and the annular check ring is installed on the outer diameter of the bearing outer ring; a closed second containing cavity is formed among the annular check ring, the hemming rubber hanging cover and the bearing inner ring, and the first containing cavity and the second containing cavity are filled with high-temperature grease. By means of the arrangement, the bearing can still keep a good lubricating effect and a good sealing effect in a high-temperature working environment.

Description

Technical Field

[0001] This utility model relates to the field of bearing manufacturing technology, and in particular to a bearing with a composite sealing structure. Background Technology

[0002] In many industrial applications, bearings often need to operate in high-temperature environments. However, ordinary bearing sealing structures are prone to seal failure under high-temperature conditions, leading to problems such as lubricant loss and foreign object intrusion, thereby accelerating bearing wear and reducing bearing life and performance. Currently, commonly used bearing sealing structures on the market typically employ single-layer sealing methods, such as sealing rings and dustproof rubber covers, or double-layer seals, such as sealing rings plus retaining rings. The sealing materials in these structures are not heat-resistant, easily aging, deforming, and losing their sealing effect, making it difficult to meet the requirements of high-temperature operating conditions. However, this sealing structure has the following problems: ① Limited temperature tolerance: Under high-temperature environments, the performance of ordinary rubber seals deteriorates sharply, easily softening and deforming, losing their original sealing elasticity and protective capabilities. They cannot maintain a good sealing effect under high-temperature conditions, and cannot effectively prevent the intrusion of external impurities and dust. They also cannot prevent significant lubricant loss, thus affecting the normal operation and service life of the bearing. ② Difficulty in guaranteeing lubrication effect: High temperatures cause the performance of traditional lubricants to deteriorate or even fail, failing to provide sufficient and stable lubrication to the bearing, increasing friction and wear, and causing premature bearing failure. ③ Poor sealing effect: Ordinary sealing structures may only have simple lip seals or dust covers. In long-term use in highly polluted environments, these structures are easily worn or penetrated by impurities, allowing impurities to enter the bearing, aggravating bearing wear, and reducing bearing service life.

[0003] Therefore, how to provide a bearing with a composite sealing structure to at least partially solve the above problems is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a bearing with a composite sealing structure that can maintain good lubrication and sealing effects even in high-temperature working environments.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A bearing with a composite sealing structure, comprising:

[0007] A bearing assembly includes an inner ring, an outer ring, and rolling elements disposed between the inner and outer rings, with cages fitted on both sides of the rolling elements.

[0008] A sealing structure is installed between the inner ring and the outer ring of the bearing. The sealing structure includes a rolled-edge adhesive cover and an annular retaining ring, both of which are annular structures. The rolled-edge adhesive cover is snapped onto the inner diameter of the outer ring of the bearing, and forms a closed first receiving cavity with the inner ring, the outer ring, and the rolling elements. The annular retaining ring is installed on the outer diameter of the inner ring of the bearing, and forms a closed second receiving cavity with the rolled-edge adhesive cover and the inner ring. The first and second receiving cavities are filled with high-temperature grease.

[0009] Preferably, the rolled edge adhesive cover includes a skeleton and a rubber sealing part. The top of the skeleton is provided with a rolled edge part, which can be engaged in the sealing groove provided in the inner diameter of the outer ring of the bearing. The rubber sealing part is connected to the bottom end of the skeleton and abuts against the outer diameter of the inner ring of the bearing.

[0010] Preferably, the rubber sealing part includes a bottom-mounted "I"-shaped sealing lip and a top-mounted sealing lip, the sealing lip including a short lip inclined toward the rolling element and a long lip inclined toward the annular retaining ring.

[0011] Preferably, there is a gap between the short lip and the inner ring of the bearing, and the long lip is interference-fitted with the outer diameter of the inner ring of the bearing. The sealing lip abuts against the inner surface of the skeleton of the annular retaining ring.

[0012] Preferably, the top of the annular retaining ring extends toward the inlet of the sealing groove and leaves a gap between it and the inlet of the sealing groove.

[0013] Preferably, the bottom of the annular retaining ring is fixed to the outer diameter of the bearing inner ring by riveting.

[0014] Preferably, the rolled edge is installed into the sealing groove by riveting.

[0015] Preferably, the frame is made of stainless steel, and the rubber seal is made of fluororubber or silicone rubber.

[0016] Preferably, the rubber seal is bonded to the skeleton by vulcanization.

[0017] Preferably, the sealing lip is inclined to match the top of the annular retaining ring and the skeleton to form a third receiving cavity for collecting incoming dust and sand.

[0018] Compared to the aforementioned background technology, the present invention provides a bearing with a composite sealing structure, comprising: a bearing assembly and a sealing structure. The bearing assembly includes an inner bearing ring, an outer bearing ring, and rolling elements disposed between the inner and outer bearing rings, with cages fitted on both sides of the rolling elements; the sealing structure is installed between the inner and outer bearing rings, and includes a rolled-edge adhesive cap and an annular retaining ring, both of which are annular structures. The rolled-edge adhesive cap is snapped onto the inner diameter of the outer bearing ring, and forms a closed first receiving cavity with the inner bearing ring, the outer bearing ring, and the rolling elements. The annular retaining ring is installed on the outer diameter of the inner bearing ring, and forms a closed second receiving cavity with the rolled-edge adhesive cap and the inner bearing ring. The first and second receiving cavities are filled with high-temperature grease.

[0019] Specifically, in this embodiment, a sealing structure is installed between the inner and outer rings on both sides of the bearing assembly, and this sealing structure is a double-layer sealing structure. The sealing structure includes a rolled-edge adhesive cover and an annular retaining ring. The rolled-edge adhesive cover is disposed in the inner layer and is snapped onto the inner diameter of the bearing outer ring, allowing it to rotate with the bearing outer ring. The bottom end of the rolled-edge adhesive cover abuts against the outer diameter of the bearing inner ring, forming a closed first receiving cavity with the bearing inner ring, bearing outer ring, and rolling elements. In addition, an annular retaining ring is also provided on the outer layer of the rolled-edge adhesive cover. The annular retaining ring is fixedly installed on the outer diameter of the bearing inner ring, and both rotate together. However, at the same time, there is no seal between the annular retaining ring and the rolled-edge adhesive cover and the bearing inner ring. A closed second receiving cavity is formed. In this embodiment, the first and second receiving cavities are filled with high-temperature grease. In this way, the sealing structure forms a double seal for the bearing assembly through the rolled-edge adhesive cap and the annular retaining ring. In addition, the high-temperature grease filled in the first and second receiving cavities also forms a double seal. Taking advantage of the viscosity and fluidity of the grease itself, the high-temperature grease filled between the rolled-edge adhesive cap and the annular retaining ring acts like a "flexible sealing layer". When the seal is affected by pressure changes or vibration, it can fill any gaps that may appear in time, effectively preventing impurities from entering and further improving the overall sealing effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the bearing structure of the composite sealing structure provided in the embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the rolled edge adhesive cap structure provided in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the annular retaining ring structure provided in an embodiment of the present utility model.

[0024] in:

[0025] 1-Bearing inner ring;

[0026] 2-Bearing outer ring, 21-Sealing groove, 22-Sealing groove inlet;

[0027] 3-Rolling element;

[0028] 4-Cage;

[0029] 5-Curled edge adhesive cap, 51-Skeleton, 511-Curled edge part, 52-Rubber sealing part, 521-Short lip, 522-Long lip, 523-Sealing lip;

[0030] 6-Annular retaining ring, 61-Inner surface of skeleton, 62-Top, 63-Bottom;

[0031] 7-First Receiving Cavity

[0032] 8-Second receiving cavity;

[0033] 9-Third receiving cavity. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0037] The purpose of this invention is to provide a bearing with a composite sealing structure that can maintain good lubrication and sealing effects even in high-temperature working environments.

[0038] To achieve the above objectives, the present invention provides the following technical solution:

[0039] Please see Figures 1 to 3 This embodiment provides a bearing with a composite sealing structure, including: a bearing assembly and a sealing structure. The bearing assembly includes an inner bearing ring 1, an outer bearing ring 2, and rolling elements 3 disposed between the inner bearing ring 1 and the outer bearing ring 2. Cages 4 are sleeved on both sides of the rolling elements 3. The sealing structure is installed between the inner bearing ring 1 and the outer bearing ring 2. The sealing structure includes a rolled edge adhesive cap 5 and an annular retaining ring 6, both of which are annular structures. The rolled edge adhesive cap 5 is snapped into the inner diameter of the outer bearing ring 2, and forms a closed first receiving cavity 7 between it, the inner bearing ring 1, the outer bearing ring 2, and the rolling elements 3. The annular retaining ring 6 is installed on the outer diameter of the inner bearing ring 1, and forms a closed second receiving cavity 8 between the annular retaining ring 6, the rolled edge adhesive cap 5, and the inner bearing ring 1. The first receiving cavity 7 and the second receiving cavity 8 are filled with high-temperature grease.

[0040] Specifically, in this embodiment, a sealing structure is installed between the inner and outer rings on both sides of the bearing assembly, and this sealing structure is a double-layer sealing structure. The sealing structure includes a rolled-edge adhesive cap 5 and an annular retaining ring 6. The rolled-edge adhesive cap 5 is disposed in the inner layer and is snapped into the inner diameter of the outer ring 2 of the bearing, allowing it to rotate with the outer ring 2. The bottom end of the rolled-edge adhesive cap 5 abuts against the outer diameter of the inner ring 1 of the bearing, forming a closed first receiving cavity 7 between the rolled-edge adhesive cap 5, the outer ring 2 of the bearing, and the rolling element 3. In addition, an annular retaining ring 6 is also disposed on the outer layer of the rolled-edge adhesive cap 5. The annular retaining ring 6 is fixedly installed on the outer diameter of the inner ring 1 of the bearing, and the two rotate together. However, at the same time, the annular retaining ring 6, the rolled-edge adhesive cap 5, and the inner ring 1 of the bearing form a closed second receiving cavity 8. It should be noted that in this embodiment, both the first receiving cavity 7 and the second receiving cavity 8 are filled with high-temperature grease.

[0041] In this way, the sealing structure forms a double seal for the bearing assembly through the rolled-edge adhesive cap 5 and the annular retaining ring 6. In addition, the high-temperature grease filled in the first receiving cavity 7 and the second receiving cavity 8 also forms a double seal. Specifically, the bearing assembly consists of four layers from the innermost layer to the outermost layer: high-temperature grease, rolled-edge adhesive cap 5, high-temperature grease, and annular retaining ring 6. In this way, the high-temperature grease not only lubricates the bearing rotation, but also, by utilizing the viscosity and fluidity of the grease itself, makes the high-temperature grease filled between the rolled-edge adhesive cap 5 and the annular retaining ring 6 act like a "flexible sealing layer." When the seal is affected by pressure changes or vibration, it can promptly fill any gaps that may appear, effectively preventing impurities from entering and further improving the overall sealing effect.

[0042] Preferably, the crimped rubberized cover 5 includes a skeleton 51 and a rubber sealing part 52. The skeleton 51 is provided with a crimped part 511 which can be clamped in a sealing groove 21 provided in the inner diameter of the bearing outer ring 2. The rubber sealing part 52 is connected to the bottom end of the skeleton 51 and abuts against the outer diameter of the bearing inner ring 1.

[0043] Specifically, as Figure 2 shown, the crimped rubberized cover 5 includes an integrally connected skeleton 51 and a rubber sealing part 52. The skeleton 51, as a connecting part, is made of a high-temperature resistant metal material. A crimped part 511 is provided at the top end thereof. The crimped part 511 is in a stretched state when the crimped rubberized cover 5 is not installed. When it is necessary to install the crimped rubberized cover 5, the crimped part 511 can be riveted into the sealing groove 21 provided in the inner diameter of the bearing outer ring 2. In the installed state of the crimped rubberized cover 5, its crimped part 511 is in Figure 1 the curled shape shown in the figure; at the same time, the rubber sealing part 52 connected to the lower part of the skeleton 51 abuts against the outer diameter of the bearing inner ring 1 to seal the high-temperature grease filled therein and prevent the grease from leaking out.

[0044] In this embodiment, the rubber sealing part 52 includes an "in" - shaped sealing double - lip provided at one end and a sealing lip 523 provided at the other end. The sealing double - lip includes a short lip 521 inclined towards the rolling element 3 and a long lip 522 inclined towards the annular retaining ring 6.

[0045] As Figure 2 shown, the bottom end of the rubber sealing part 52 is provided with an "in" - shaped structure sealing double - lip, specifically a short lip 521 and a long lip 522. Among them, the short lip 521 inclines towards the first accommodating cavity 7. In this way, when the bearing rotates, the high - temperature grease will rotate with the rolling element 3 and has a tendency to flow outwards. In this way, the high - temperature grease will be guided by the short lip 521 to flow back to the rolling element 3 again, that is, to guide the high - temperature grease to form a reasonable circulation inside the bearing, so that the rolling element 3 can be fully lubricated; and the long lip 522 inclines towards the second accommodating cavity 8, and its length is greater than that of the short lip 521.

[0046] Furthermore, there is a gap between the short lip 521 and the bearing inner ring 1, an interference fit between the long lip 522 and the outer diameter of the bearing inner ring 1, and the sealing lip 523 abuts against the inner surface 61 of the skeleton of the annular retaining ring 6.

[0047] A certain gap is left between the short lip 521 and the outer diameter of the bearing inner ring 1, and the two do not contact each other. This can reduce the leakage of high-temperature grease as much as possible while further reducing the sealing torque. The long lip 522 makes an interference contact seal with the outer diameter of the bearing inner ring 1, which can effectively prevent foreign objects from entering the bearing and also serves as a second protective layer to prevent grease leakage. The sealing lip 523 is located at the upper end of the rubber sealing part 52 and extends obliquely toward the annular retaining ring 6 until it abuts against the inner surface 61 of the skeleton of the annular retaining ring 6. This arrangement can form a closed second receiving cavity 8 with the inner surface 61 of the skeleton of the annular retaining ring 6, the outer diameter of the bearing inner ring 1, and the long lip 522. This receiving cavity is also filled with high-temperature grease. The high-temperature grease itself has a certain viscosity and fluidity, making the high-temperature grease filled in the second receiving cavity 8 act like a "flexible sealing layer". When the rolled edge adhesive cap 5 and the annular retaining ring 6 are affected by pressure changes or vibration, it can promptly fill any gaps that may appear, effectively preventing impurities from entering and further improving the overall sealing effect.

[0048] Preferably, the top 62 of the annular retaining ring 6 extends toward the sealing groove inlet 22 and has a gap between it and the sealing groove inlet 22.

[0049] Specifically, such as Figure 1 As shown, the top 62 of the annular retaining ring 6 extends toward the sealing groove inlet 22, but does not contact the outer ring 2 of the bearing. This is to prevent friction between the annular retaining ring 6 and the outer ring 2 of the bearing. In addition, a small gap is left between the top 62 of the annular retaining ring 6 and the sealing groove inlet 22 to prevent sand and dust from entering.

[0050] Preferably, the bottom 63 of the annular retaining ring 6 is fixedly installed to the outer diameter of the inner ring 1 of the bearing by riveting.

[0051] In this embodiment, the bottom 63 of the annular retaining ring 6 can be riveted to the outer diameter of the bearing inner ring 1, or it can be installed by screws or other means, which is not specifically limited in this article.

[0052] Preferably, the rolled edge portion 511 is installed into the sealing groove 21 by riveting.

[0053] Understandably, in order to facilitate the installation of the rolled edge adhesive cover 5, the rolled edge part 511 is directly snapped into the sealing groove 21 to complete the installation of the rolled edge adhesive cover 5. Therefore, the installation difficulty can be reduced by riveting.

[0054] Preferably, the frame 51 is made of stainless steel, and the rubber sealing part 52 is made of fluororubber or silicone rubber.

[0055] Understandably, in order to enable the bearing to withstand high-temperature working environments, both the rolled edge rubber cover 5 and the annular retaining ring 6 are made of special high-temperature resistant composite materials, and the high-temperature grease filled in this embodiment is also heat-resistant. Specifically, the skeleton 51 and the annular retaining ring 6 are preferably made of stainless steel, while the rubber sealing part 52 is made of fluororubber or silicone rubber. With this configuration, these materials can maintain the integrity of the sealing structure and the stability of performance at higher temperatures, effectively preventing seal failure caused by high temperatures.

[0056] In this embodiment, the rubber sealing part 52 is bonded to the skeleton 51 by vulcanization. Of course, other connection methods can also be selected, which are not specifically limited in this article.

[0057] Preferably, the sealing lip 523 is inclined to match the top 62 of the annular retaining ring 6 and the skeleton 51 to form a third receiving cavity 9, which is used to collect incoming dust and sand.

[0058] Specifically, such as Figure 1 As shown, the sealing lip 523, the skeleton 51, and the top 62 of the annular retaining ring 6 form a third receiving cavity 9 with the sealing groove inlet 22 as the opening. It is understandable that even if the gap at the sealing groove inlet 22 is very small, even smaller dust particles will enter. In this way, the third receiving cavity 9 can collect the smaller dust particles that enter.

[0059] In summary, the present application provides a bearing with a composite sealing structure, which is composed of a crimped rubber-coated cover 5 with three lips and an annular retaining ring 6. The crimped part 511 of the crimped rubber-coated cover 5 is deformed by riveting so that it is firmly fastened in the sealing groove 21 provided in the inner diameter of the bearing outer ring 2. After riveting, the crimped rubber-coated cover 5 is firm and reliable and not easily detached. The "inverted V" sealing double-lip design at the lower end of the crimped rubber-coated cover 5 includes a short lip 521 and a long lip 522. The short lip 521 is designed to incline at a specific angle towards the inside of the first accommodating cavity 7, ensuring that when the bearing rotates, it can guide the high-temperature grease to form a reasonable circulation inside the bearing, enabling the high-temperature grease to lubricate the rolling elements 3 and the raceways more fully. At the same time, a specific small gap is left between the short lip 521 and the outer diameter of the bearing inner ring 1, and the two are not in contact, which can reduce the leakage of high-temperature grease and further reduce the torque generated when the bearing rotates. The long lip 522 is in interference contact sealing with the outer diameter of the bearing inner ring 1, which can effectively prevent foreign objects from invading the inside of the bearing and is also the second protective layer against grease leakage. The sealing lip 523 on the upper surface of the crimped rubber-coated cover 5 is in interference contact with the inner surface 61 of the skeleton of the annular retaining ring 6 outside the bearing. This sealing helps to ensure that the high-temperature grease filled between the sealing lip 523 and the annular retaining ring 6 is not easily leaked when the bearing rotates. At the same time, due to the viscosity and fluidity of the high-temperature grease itself, the high-temperature grease filled in the second accommodating cavity 8 is like a "flexible sealing layer". When the crimped rubber-coated cover 5 and the annular retaining ring 6 are affected by pressure changes or vibrations, it can timely fill the possible gaps, effectively preventing impurities from entering and further improving the overall sealing effect. The external sealing of the bearing is the annular retaining ring 6. The bottom 63 of the annular retaining ring 6 is fixed on the outer diameter of the inner ring by riveting. The top 62 of the annular retaining ring 6 extends into the entrance 22 of the sealing groove of the bearing outer ring 2 and leaves a small gap with the entrance 22 of the sealing groove, effectively preventing sand particles and dust from entering. In this way, a multi-labyrinth composite sealing structure is formed by the crimped rubber-coated cover 5, the annular retaining ring 6 and the flexible sealing layer composed of the high-temperature grease filled between the two sealing parts, effectively ensuring that the bearing can maintain good sealing performance in a high-temperature environment and extending the service life of the bearing.

[0060] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0061] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0062] The embodiments provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A bearing with a composite sealing structure, characterized in that, Comprising: A bearing assembly, including an inner bearing ring (1), an outer bearing ring (2), and rolling elements (3) disposed between the inner bearing ring (1) and the outer bearing ring (2), with cage (4) sleeved on both sides of the rolling elements (3); A sealing structure, installed between the inner bearing ring (1) and the outer bearing ring (2), the sealing structure includes a crimped rubber-coated cover (5) and an annular retaining ring (6), and both are annular structures. The crimped rubber-coated cover (5) is clamped to the inner diameter of the outer bearing ring (2), and a closed first accommodation cavity (7) is formed among it, the inner bearing ring (1), the outer bearing ring (2), and the rolling elements (3). The annular retaining ring (6) is installed on the outer diameter of the inner bearing ring (1), and a closed second accommodation cavity (8) is formed between the annular retaining ring (6), the crimped rubber-coated cover (5), and the inner bearing ring (1). High-temperature grease is filled in the first accommodation cavity (7) and the second accommodation cavity (8).

2. The bearing with the composite sealing structure according to claim 1, characterized in that, The crimped rubber-coated cover (5) includes a skeleton (51) and a rubber sealing part (52). The skeleton (51) is provided with a crimped part (511), and the crimped part (511) can be clamped into a sealing groove (21) provided on the inner diameter of the outer bearing ring (2). The rubber sealing part (52) is connected to the bottom end of the skeleton (51), and the rubber sealing part (52) abuts against the outer diameter of the inner bearing ring (1).

3. The bearing with the composite sealing structure according to claim 2, characterized in that, The rubber sealing part (52) includes a "V" - shaped sealing double lip at one end and a sealing lip (523) at the other end. The sealing double lip includes a short lip (521) inclined towards the rolling elements (3) and a long lip (522) inclined towards the annular retaining ring (6).

4. The bearing with the composite sealing structure according to claim 3, characterized in that, A gap is left between the short lip (521) and the inner bearing ring (1), an interference fit exists between the long lip (522) and the outer diameter of the inner bearing ring (1), and the sealing lip (523) abuts against the inner surface (61) of the skeleton of the annular retaining ring (6).

5. The bearing with the composite sealing structure according to claim 4, characterized in that, The top (62) of the annular retaining ring (6) extends towards the sealing groove entrance (22), and a gap is left between it and the sealing groove entrance (22).

6. The bearing with the composite sealing structure according to claim 5, characterized in that, The bottom (63) of the annular retaining ring (6) is fixedly installed to the outer diameter of the inner bearing ring (1) by riveting.

7. The bearing with the composite sealing structure according to claim 2, characterized in that, The crimped part (511) is installed into the sealing groove (21) by riveting.

8. The bearing with the composite sealing structure according to claim 3, characterized in that, The skeleton (51) is made of stainless steel, and the rubber sealing part (52) is made of fluororubber or silicone rubber.

9. The bearing with the composite sealing structure according to claim 3, characterized in that, The rubber sealing part (52) is bonded to the skeleton (51) by vulcanization.

10. The bearing with the composite sealing structure according to claim 5, characterized in that, The sealing lip (523) is inclined to cooperate with the top (62) of the annular retaining ring (6) and the skeleton (51) to form a third accommodation cavity (9), and the third accommodation cavity (9) is used to collect the entering dust and sand.

Images